Mechanical pencil



June 1 1926.

, F. c. DELI MECHANICAL PENCIL Filed June 30, 1924 2 Sheets-Sheet 1 June1 1926. I 1,586,522

I F. C. DEL| MECHANICAL PENCIL- Filed June 30, 1924 2 Sheets-Sheet 2 2g:2 W 25k JIM/61% Pat'ented June 1,1926. j UNITED STATES ram 0. iiiim, orCHICAGO, ILLINOIS, Assienon 'ro aororomz'r coirrm, or

- CHICAGO, rumors, a CORPORATION 01' rumors. I

i MECHANICAL rnncin;

Application 11211 June 30, 1924. Serial No. 723,318.

This application is acontinuation, so far there is common subjectmatter, of coding application Serial No. 444,956, filed herein claimedwas also fully disclosed in my copending application Serial No.504,839,.

filed Oct. 2, 1921. The principle, ofoperation of the said pencil wasfirst disclosed in in my copending-application Serial No. 406,980, filedAugust so, 1920.

This invention relates to certain new and useful improvements in leadpencils of the magazine or mechanical type, commonly called Eversharppencils, and it consists in certain peculiarities of the construction,novel arrangement, combination and operation of the various hereinaftermore fu 2o caii y;1 claimed. j i v i e principal object of my present;invention is the production of a pencil of the above named t pe havingthe qualities of all adaptability t at is required in pencils of y setforth and specifi-' said class, at a minimum costof manufacture.

and assemblage, without sacrificing any of its advantages or merits.

. A furtherobject'is to provide such a pencil which shall be attractivein appearance, strong, durable'and highly efiicient in operation, withits parts so made, arranged and operating, that a number of leads can becarned thereby, with onelead in operative position to be advancedthrough one end of the to body of the pencilfor use, or retracted whennot in use, to prevent the point thereof being broken or impaired.

A further object is to provide means for actuating a plunger for the orative lead of the penc l b the rotation o a shell or tip to pause sailead to be advanced or fed for-- we I Stili another object is to utilizea part ofthe plunger operating mechanism as a id ing)support or holderfor. the operativediiad.

ther objects of the invention will be obvious from the following.description and ex lanation. I n the accompanying drawings which serveto illustrate an embodiment of theinvention;

Fig. 1 view of one form of the invention, showing the parts in about thepositions they will occupy when the operative lead of the pencil Themechanical construction of the pencil arts thereofas will be is'ayce'ntral longitudinal sectional is advanced through the front end ofthe latter sufiiciently for writing purposes;

Figs. 2, 3 and 4 are cross sectional views taken on lines 2-2, 3-3,'and4-4= respectivel of Fig. 1, looking in the direction indicate by thearrows;

Figs. 5 and 6 are cross sectional views taken on a line as at about 2-2of Fig. 1, showing modified constructions of the parts comprising thebarrel of the pencil;

Fig. 7 is a view similar to Fig. 1, but illus trating a modification inthe construction of the barrel of the pencil;

1,586,522 PATENT-,OFF'ICE.

4 Figs. 8, 9 and 10 are plan sectional views taken on the lines 8-8,9-9, and 10-10 re-- spectively of Fig. 7, and,

Fi 11 is'a detached view in elevation of views ofthe drawings.

Referring now more particularly to Figs. 1 to '6 inclusive of thedrawings, the reference numeral 15 designates as a whole the barrel orbodyof the pencil which by preference is cylindrical 'inshape as shown.This barrel is provided at its upper or rear end with a reduced portion16 on which is' closely fitted a ferrule 17 which extends beyond theupper end of the barrel 15 and has fitted therein an: eraser18 of rubberor other suitable material. The barrel 15 is provided throughout itslength with. a bore which is transversely divided into com artments orportions of difierent sizesand sha es for the purposes to be tpresentlyexplaine The lower or front en of the barrel 15 is pro.-

vided with areduced portion 19 for the reof a downwardly.- taperedoperating shell or tip 20' which is by preference made of meta and hasin its tapered end slits 21 to allow. its tapered extremity toresiliently grip the operative lead 22, of thedevice.

I e bore or cavity in the upper portion of the barrel 15 is y preferencecircular in cross'secti'on, as shown inFig. 2, and at the lower end ofsaid circular part of the bore a disk'or. plate 23 is secured, whichwill form a floor or bottom for the circular compartment 24, thusadapting it for use or as a magazine for the reception of a pluralitythe p unger o crating mechanism and guide ception and operation of theupper portion x of leads 25, which can inserted into the compartment ormagazine 24 b removing the eraser 18 from the ferrulel or by removingthe ferrule 17 with the eraser 18 therein from the upper portion of thebarrel. The lower portion of the bore in the barrel 15 is circular incross section, as shown at 26 in Fig. 4. The portion 26 of theboreextends from the lower end of the barrel 15 upwardly therein to asuitable distance, ap-

proximately about one-third of the length of the barrel. Theintermediate portion 27 of the bore of the barrel is angular. in cross20 at the lower end of the'cy indrical portion of said shell, whichportion fits around the reduced portion 19 of the barrel so as topresent its outer surface flush with the outer surface of the barrelthus lending attractiveness to the structure, is a centrall aperturedplate or disk 28, which is fixe to the shell 20 and adapted to rotatetherewith.

It will be noted that the tip frictionally engages the reduced portion19 and is retatab e thereon and removable therefrom by a straightlongitudinal pull.

Located in the portion 26 of the bore of the barrel and extended fromthe upper end of said portion through its lower end as well as throughthe aperture of the plate 28, and

into the tapered cavity of the tip 20, where it is secured thereto, is atube 29 which is provided with a spiral groove or track 30 formed with adie, in the operation of which it will be understood that the walls ofthe groove 30 will be pressed inwardly of the tion and operation of theoperative lead 22 v as well as for the feeding lunger 32, which has atits upper end an en arged head 33 located in the angular portionorguideway 27 of the boreof the barrel which angular portion willcooperate with the head 33 so as to permit of longitudinal movement ofsaid parts. The lower portion of the plunger 32 is provided with one ormore laterally disposed ofi'set portions 34 toengage the spiral channel31 of the tube 29, as will be readily understood by reference to Figs. 1and 7 of the drawings. The tube 29 is fixed to the plate 28 so that itwill turn with the shell 20 when the latter is rotated on the lowerportion of the barrel. As the lower end of the plunger 32 rests on theupper end of the operative lead 22, it is manifest that by turning theshell 20 in the proper direction, the

plunger 32'will be advanced by reason of 1ts engagement with the spiralchannel 30 of the tube 26, thus causing the operative lead to be fedforwardly. When it is desired to insert a lead into the shell 20and'lower end of the tube 29, it is obvious that the plunger i can beretracted by rotating the shell 20 in the proper direction, when a leadcan be inserted into the free end of the shell 20 and lower end of thetube 29 until the upper end of the said lead contacts with the lower'end of the plunger. Obviously also, the tip, at-

tached parts and plunger may be removed from the lower end of the bodyas a unit in any position of adjustment of the parts and t at when soremoved the plunger may be retracted. and removed from the open upperend of the tube and a renewal lead inserted in said open upper end.

In the construction now under consideration, that is to say, in theviews illustrated in Figs. 1 to 6 inclusive of the drawings, it will beseen and understood that the barrel 15 is made of two pieces 35 and 36,and that these pieces are converse to one another'and may be made of anysuitable composition molded to the form desired. That is, the meetingedges of the pieces 35 and 36 constituting the barrel 15 are providedwith interlocking recesses 37 and correspondingly shaped projections 38to fit in said recesses.

These recesses and projections are disposed longitudinally on themeeting edges of the members 35 and 36 of the barrel and it will bereadily understood that said members can be cast in the same molds andbe readily placed in position with respect to one another so as to formthe barrel of the pencil.

In assembling the pieces 35 and 36 their:

meeting edges may be supplied with a suitable adhesive so thatwhen theyare placed in position as shown in thedifi'erent views of the drawings,they will be securely connected together and that the interlockingarrange and have shown one of the edges of the member 36 provided with asingle recess 37 and its other edgewith a singleprojection" 38 whichprojection and recesses cooperate with one'another, yet, in someinstances I may vary the form employed for interlocking the meetingedges of the said pieces, for. instance, as shown in Fig. 5, one of theedges 4 of 'the member 35 may be provided with two projections 38 to fitin a corresponding numor of recesses 37 on theadjaeent edge of themember 36 and may provide the other edge oft'he member 35 with a pair ofrecesses 37 to receive a pair of projections-38 on the adjacent edge ofthe member 36, or as shown in Fig. 6, the meeting edges of 'the members35 and 36 may be provided with angular j ofiset recesses andcorrespondingly shaped projections to cooperate therewith.

In F1 7 to 10 inclusive I have illustrated a modi cation in the construn ofthe pencil which consists in making the barrel 39 of said modifiedform of a single iece of wood and'externally of any desired s rape incross section,- but preferably hexagonal, as shown. Inthis. modificationthe barrel 39 is formed and equipped with afferrule 17 and an eraser 18,as in the first described construction, and likewise has a bore withdifferent sized and shaped compartments or ortions 24, 26 and 27. Thelower end of t e-barrel 39 is reduced and has fitted thereon a metalferrule 40, on which the cylindrical portion of the shell 20' is .fitted0.1- maiwhich extends from wardly to the upper en 1 of the bore, whichportion is equip ed with tends through an apertured disk or' plate 28fixed to the shell 20 in the upper portion ofinsai tion and removal aswill be understood by reference to Fig. modified construction thecompartment or ortion' 27 oithe bore of the barrel is circuar in crosssection and has fitted therein an angular tube 41,

roviding a guideway the flooror bottom 23 of the magazine or comartment24 downof the portion 26 a metal tube 42 which extends'to t elower ,end'of'the barrel 39 and within the tube 42 with-a spirallygrooved tube 29,. which ex tl 'e ta ered part thereof an downwardlytapered construction the. 'sk orplate 28 is fixed to ,the tube 29-, soas to 'turn with the shell 20; The plunger em loyed in the modifiedconstruction 1s simi ar to that. illustrated in the first abovedescribed construction and oper ates in a similar manner. a

. From the foregoing it will be understood that by my improvements, apencil of an extremely simple construction and attractive of thedrawings. In this i rtion. As in the other threads in the lea tion,a-tip having-a tapered portion and a generally cylindrical portion, saidcylindrical port1on overlying and .frictionally enga ing the reducedportion of; the body, a tu open at both ends and projecting axiallywithin the tip and secured thereto and provided with threads, and aplunger having appearance will be provided, and that the rtion of saidrecess, said body having a re uced lower-end pora non-circular portionat its upper end adapted to cooperate with said guideway and at itslower end having'a portion adapted tocooperate-with said threaded tube,the tip, tube and plun er being removable from the lower end of t epencil in any position of adjustment of the parts. Y 2. Ina pencil, thecombination of a having an axial recessopen at both ends of the body, aportion of the recess being non- V circular in cross section,'a tiphaving a cy lindrical portion adapted to overlie and frictionally engagewith the lower end of the body, a threaded lead receiving and idin tubeopen at both ends and seated wit inan secured to the tip, and a plungerhaving a non-circular portion adapted to cooperate with the non-circularportion of the recess in the body and at its lower end having a lat--eral projectionada ted to cooperate with the the recess in the bodyprovidin a space for reserve 'leads, the tip,- tube an plunger beingremovable from the lower end of the tube, the @per end of,

pencil by a direct endwise movement in any position of ad'ustment of theparts.

Signed at May, 1924.

i a v FRANK C. DELI.

hicago, 111., this 31st da of

